Physics Questions and Answers December 07, 2022

Two blocks are positioned on surfaces, each inclined at the same angle of 40.1 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is 6.44 kg, and this time there is NO friction. What is

Evaluate the ratio of the de Broglie wavelength of electron to that of proton when (m9.11 103 kg, m1.67 107 kg) (i) both have the same kinetic energy. (ii) The electron kinetic energy is 1000 eV, and the proton kinetic

A rod of length L5 m is pivoted about one end. A 10 N force is 3 m from the pivot and to the rod as shown in the image. The force and the rod are both located in the plane of the page. 3m Force i) The magnitude and ii) direction of the torque about the pivot are A)15 Nm, into the page B) 30Nm, out of the page C)30Nm, into the page D) 60Nm, out of

A uniformly charged disk is rotating around an axis that passes through the center of the disk and is perpendicular to the plane of the disk as shown in the figure. The angular speed of rotation is 3.8 rads. If the radius of the disk is 1.6 m and the electric charge density of the disk is 5 Cm, what is the dipole contribution to magnetic potential

Tritium is radioactive with a halflife of 12.33 years decaying into 3He. If we have a sample of 3E18 tritium atoms, what is its activity in decayssecond (1year 3.15E7 s) 5.35E9second 3.69E8second 6.64E7second 4.20 E10second

The halflife of 18N (Nitrogen with mass number of 18) is 0.62 s. What is the decay constant for this isotope 0.43 S1 The decay constant is not defined for a halflife of less than one second. 1.7 E11 Ci 1.1 s1

6. One mole of an ideal gas with y 1.4 is taken through the cyclic process depicted in Fig. 2. From A to B it undergoes an isothermal expansion. (6 pts) (a) Calculate the work done by the gas along each segment AB, BC and CA and add these values to get the total work. P(kPa) 150 100 20 Fig. 2 B 30 V(L) (6 pts) (b) Find the heat absorbed per cycle

What is the Qvalue for the reaction where the products are 0.005 u less than the reactants (1 u 931.5 MeVc 2) O 4.7 MeV O 8.5 MeV 5.2 MeV O 7.6 MeV

Infinitely long cable having Radius of 2cm, carries the current of 2A. Find the magnetic field strenght at r3cm a)15 . b)2 . c) 5. d)13 . e) 8 .

y,1.7 particles with charge q 4.0 nC are exactly the same. They are placed 30 degrees apart along the circumference of a circle of radius 2.0 cm, forming a semicircle on the left as shown. Set ke 9.0 x 109 NmC2. (a) Find the total electric field at the point center of circle (b) If a particle with a charge of 4.0 C and a mass of 1.0 mg is placed

One pure gold ring ( 2 4 karat ) , mass 1 7 . 7 g. ( a ) How many protons will there be ? And what is the total positive charge of these protons? ( b ) If this ring is neutrally charged How many electrons are there in this ring?

A line of charge of length 22 has a charge density per unit length equal to as shown in the figure. The electric field due to this line of charge at position P is a perpendicular distance a from the center of the line of charge. What size and direction will it be (Draw a picture showing d for analysis) L P. (13 a L A

5 The diagram shows an electrical circuit. 1.5V 500 F 100F a Calculate the total capacitance of the two capacitors in parallel. b What is the potential difference across each capacitor c Calculate the total charge stored by the circuit. d Calculate the total energy stored by the capacitors.

If a hurricane is moving North at a velocity of 20 mph and it has sustainded winds of 100 mph in the eye wall. You are located in the eye wall at the surface to the east of the eye (right). What will your wind velocity be?

,Imagine heating 1 L of water over a campfire and 1 L of water on an electric range. a. Which method of heating water would be most efficient (faster temperature change) b. Draw arrows in the diagram to show where the thermal energy is moving in this system. c. Explain your reasoning. Assume that both the wood fire and the electric range element

An airplane typically approaches a runway for landing at a descent angle of 3. However, a jet experiences problems and makes an emergency descent through the air at an angle of 10. If this jet is landing with an airspeed of 160 knots, and there is a 35 knot crosswind at right angles to the runway, what is the jet's true ground speed?

Consider two point-like objects M, and M2, with Me having four times the mass of M2. They are placed a distance d apart from each other. (a) Sketch (in 2-dimensions) the gravitational field lines that are present in the region of space around the two masses. Show the direction of the field on the field lines. (b) Explain quantitatively where you

The distance (in miles) a car travels is given by the function s(t) =t + 3, where t is measured in minutes. What is its acceleration after 3 minutes ?

How did Newton explain the Moon's orbit about the Earth? O Gravitational force provides the push necessary to keep the Moon going and not slow down. O The Moon is pulled towards the Earth by gravity, this bends the moving Moon into its orbit. O The Moon moves away from the Earth but eventually gravity will stop it and pull it back. O The Moon's

An apple of 10 N is dropped from 4 meters above the ground. What is its total mechanical energy at 1 m with respect to the ground?

The Earth is 149,600,000,000 m from the Sun. The Sun has a mass that is 333,165 times as large as Earth. Where should a particle be placed between the two so that it feels no net force from the two objects due to gravity?

A comparison between an elephant versus an ice skater, and which would fall through "thin ice". What was the reason the elephant was less likely to fall through? DO The elephant was on very small feet. Unable to give a reason, as the "thin ice" was not defined. The skater was on very thin blades. The elephants force was more evenly distributed.

Superconductors have resistance R 0 when temperature T < Tc. TF Conventional current is in the direction of electron motion. An electric motor "draws" an electric current i(t) = 20.0 A sin(120(rad/s)t(s)). Determine the charge which flows from 0.000 to (1/240) s.

In the Oso landslide, a high speed flow of fluidized mud, rock, and debris called a () traveled 1.1 km (0.7 mi.). 1) slump 2) lahar 3) debris avalanche 64 4) rock fall

Which object has the greatest inertia a 15 kg object moving at a speed of 1.0 ms a 5.0 kg object at a speed of 5.0 ms a 10.0 kg object moving at a speed of 3.0 ms a 20.0 kg object at rest

To measure the magnitude of the acceleration due to gravity g in an unorthodox manner, a student places a ball bearing on the concave side of a flexible speaker cone ( Figure 1). The speaker cone acts as a simple harmonic oscillator whose amplitude is A and whose frequency f can be varied. The student can measure both A and f with a strobe light.

1 milligram of 9 0 Sr upon secular equilibrium will be how many grams of 9 0 Y ? 9 0 Sr - > 9 0 The half - life of 9 0 Sr is 2 9 . 1 2 years, and the half - life of 9 0 Y is 6 4 hours.

A gun is mounted on a wooden plank. The plank is stationary and is mounted on frictionless wheels. A heavy wooden block is set in front of the gun, and the gun is fired into the wooden block, which then slows to a stop due to friction between the block and the plank. a) The plank will have shifted position relative to its starting point. b)

m A car accelerates to a velocity of 81.0k from rest in 5.60s. It continues to accelerate for another 3.80s, which causes its velocity to increase by 17.0k. What are the average accelerations of the car from the moment it starts accelerating to the moment it reaches a velocity of 81.0k for the time interval during m m which it increments its

A patient in recovery restores 1 . 3 kg of body mass in a week. How many micrograms / second ( mu g / s ) are being restored? A . 3 6 mu g / s B . 5 . 2 times 1 0 4 mu g / s C . 2 . 1 times 1 0 3 mu g / s D . 1 . 3 times 1 0 5 mu g / s

A cylinder of mass (251.2 0.1) g the height h(4.00.1) cm and the diameter d(2.00.1)cm find a) The volume of the cylinder b) The density of the cylinder(p) c) The uncertainty in the density (Ap) 127 F2 notation) m1100g m2120g F1 1 0 cm3 inequilibrium Find gmcm3 The figure shows a force table F1j notation) F3 F2 notation) gmcm3 it j (vector j

Much of what we know about music in Early times has been discovered by archeological discoveries in which part of the modern world, Europe Mesopotamia Aisa Australasia

simple pendulum A simple pendulum of length L0.25 m is in harmonic motion. 1 Find the periodic time T 2 How many cycles are completed in 60seconds h4cm L 80cm X64cm SEC In an inclined plane experiment, the cart moves down an inclined frictionless plane. if the initial speed (Vi) 0 ms (at rest) and consider g10ms2 2 find the time to cover the

1. It is easy to show that in fcc lattice four basal atoms (000),(0, , ), (,0, ), (, ,0) form regular tetrahedron with the center at ( , ). It is called the tetrahedral void. The lattice cell center at ( , , ) has 6 next neighbors forming regular octahedron it is called the octahedral void. Structure of ceria (CeO) is of fluorite type, cubic,

Can you solve for the resistors and capacitors using Kirchhoff's Law? I need the equations for all 5 loops . Please do the first loop at least. I gave an example below Solve for both current and voltage. Iin = I 1 + I 2 = Vin / R 1 + C 1 dVin / dt + V 1 2 / R 2

RUI O ... V1 120Vrms 60Hz 0 12 1A 1kHz 0 R1 1kQ C1 1uF R2 R3 1kQ C2 1uF 1uf 1kQ 104 1uF R5 1kQ C6 1uF 1uF R6 1kQ R7 1kQ

A model airplane has a mass of 0.900 kg and moves at a constant speed on a circle that is parallel to the ground. Without a lift force acting on the wings to keep the guideline level, it slopes downward due to the weight of the plane. Find the tension in the guideline (whose length is 17.0 m) for airplane speeds of 19.0 and 38.0 m/s.

Which table correctly displays the information provided within the problem below A train travels 8.81 ms in a 51.0 direction. The train accelerates for 2.23 s, changing its velocity to 9.66 ms in a 37.0 direction. What is Ax A) X Vi 8.81 Vf 0 a Ax t 2.23 Y 0 9.66 9.80 2.23 B) X Y Vi 8.81 8.81 Vf 9.66 9.66 a Ax AX t 2.23 2.23 C) x Y Vi 5.54 6.85

The dispersion relation of a monatomic chain is described by the relation sinka 4C where w is the frequency, k is the wavevector, a is the spacing between the atoms, C is the spring constant of the bond between the atoms and m is the mass of the atoms. What is the maximum frequency that can propagate along the chain Over what range is this

Einstein assumed that the atoms in a dielectric solid behave as isolated harmonic oscillators with quantised energies, oscillating at the same frequency. From these assumptions show that the heat capacity in a 3D solid is xe C3NkB (ex1) ho where x and N is the number of atoms. KT Also show that in the high temperature limit the DulongPetit value

On a compact disc audio information is stored digitally in a series of pits and flat areas on the surface of the disc. The alternations between pits and flat areas on the surface represent binary ones and zeroes to be read by the CD player and converted back to sound waves. The pits and flat areas are detected by a system consisting of a laser and

If you would have circularized the orbit when reaching Mars (before entering the SOI) and only after that entered the sphere of influence, on what kind of trajectory would the spacecraft be

A straight long solid cylindrical conductor of radius a carries current I along its length. The current density varies as JJor within the conductor, where r is the radial distance from the axis of symmetry of the conductor. (a) Find the constant Jo in terms of quantities given (b) ind the magnetic field strength for r a. (c) Find the magnetic

a) b) When jam is made, it is put into the jam jar and the top screwed down whilst the jam is still hot. The top makes an airtight seal with the jar and the air trapped above the jam cools and so the pressure of the trapped air reduces. 6 cm Trapped Air JAM

Compute the gyro radius Larmor radius and cyclotron frequency (w.) for the following plasma configuration A 2.5 MeV He particle in a 7T fusion reactor. Note that the pitch angle 90 and Het 6.6 x 1027 kg. Calculate the plasma angular frequency in the neutron star environment of temperature T 100 keV and electron density is 10 cm

3. (30)a) Show that T.dS cv.dT(TaB).dV using generalized method. dScpT.dTa.V.dP and dVaV.dTBV.dP b) Calculate the entropy change as the temperature and volume of the one mole of ideal gas were taken from 273K and 22.4lts to 373K and 44.8 Its. R8.314 Jmol.K0.082 lt.atmmol.K

Sam makes an electromagnet. He coils a wire around a big iron nail.com He connects the ends of the wire to a battery. Sam uses his electromagnet to pick up paperclips. Sam then changes the number of coils of wire around the nail. He wants to answer the question How does the number of coils affect the strength of the electromagnet Each time he

If the vertical and horizontal motions of projectiles are independent, then why did the range of our mousetrap catapult change when we changed the launch angle?

What is the maximum potential energy U when the springs are maximally compressed or stretched tot mx and the rod is rotated from the equilibrium position a) 2k8 0 b) 4K0 c) 0 d) Kie e) 2K1

What is the relation between the maximum kinetic energy KE mx U tot mx 2 a) KE mx d) KE e) KE b) KE 2U mx c) KE mx U mx mx tot mx U tot mx 2 U totmx tot mx U totmx and the maximum potential energy

Suppose a paperclip with a mass of 1.5g was accelerated to a speed of 2.91108m/s . How mush momentum would it have? a. 4.4105kg.m/s b. 1.8106kg.m/s c. 2.5106kg.m/s d. 1.2109kg.m/s

You should now be able to observe that the chamber is 10nm by 10nm. You may assume that the chamber is 10nm deep so that the volume of the chamber is 1000nm 3 (= length x height x depth = 10nm x 10nm x 10nm. Then record the temperature and pressure in columns 2 and 4 in Table . Calculate the volume assuming a depth of 10nm for the chamber. Enter

A block floats in water as shown below (left container). An identical block (right container) is placed in an unknown fluid and floats as shown below. HO The density of the unknown fluid... A. ...is greater than the density of water. B. ...is the same as the density of water. C. ...is less than the density of water. D. ...cannot be determined

The Bailey Construction Company is considering the purchase of a diesel power shovel to improve its productivity. The shovel, which costs $80,000, is expected to produce a before-tax benefit of $36,000 in the first year and $4,000 less in each succeeding year for a total of five years (i.e., before-tax benefit of $32,000 in the second year,

Using a constant amplitude of 30 cm, and a constant mass of 100 g, measure the time for 10 cycles at lengths from 1 m to 0.1 m. 2. Calculate the period, T and the frequency, f for each trial. Observations Length, L (1m) 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 Mass, m (kg) 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 Angle for Amplitude A (m) 0.3 0.3

1. How is the frequency of a pendulum affected by the amplitude of the pendulum as the mass and length are kept constant 2. How is the frequency of a pendulum affected by the mass of the pendulum as the amplitude and length are kept constant 3. How is the frequency of a pendulum affected by the length of the pendulum as the amplitude and mass are

Two children go tobogganing on an icy hill. They start at A with a velocity 2ms at the top of the hill as shown. The toboggan and children have a combined mass of 95 kg. If friction is small enough to be ignored, calculate the total mechanical energy of the toboggan at A. the speed of the toboggan at B. the kinetic energy of the toboggan at C. a)

A 500g piece of silver at 150C is submerged in 1000g of water at 5C to be cooled. Determine the final temperature of the silver and water given Cwater 4.18 x 10 Jkg C Csilver 2.4 x 10 jkg C

In an orthogonal cutting operation, consider the following parameters to 0.15 mm, V 2.5 ms, a 13, and the width of cut is 4.5 mm. During the operation, it is noted that to 0.20 mm, F 500 N, and Ft 200 N. Calculate the percentage of the total energy that is expended in overcoming friction at the toolchip interface.

(1) Staring with the canonical commutation relations for position and momentum p thd 0 and .. 0, work out the following D L,9 ihx Lz Py ihpx (2) Use these result to obtain L,Lx ihly and 1, Ly 0

The mass of a density bottle of 50cm 3 is 10.0g when empty. Aluminium turning are poured into the bottle and the total mass is 60.0g. Water is then added into the turnings till the bottle is full. If the total mass of the bottle and its contents is 90g, calculate the density of Aluminium.

Which of the following statements is a False statement O Higher cooling rate after polymerization results in lower crystallinity. O Block copolymers have higher crystallinity than grafted polymers. O Thermoplastics do not cross link. O Conformation is higher in thermoplastics than thermosets. O Glass transition temperature can be positive or

A tire balance weight is a piece of lead with a mass of 70 grams. The total diameter of the wheel, including the tire, is 26.5 inches. The weight is mounted on the rim, and the tire wall is 3.2 inches tall. After the weight is installed, the owner drives the car on the highway at 71 miles per hour. What is the magnitude of the difference between

Of the three traveling waves listed below, which one(s) is(are) traveling in the x direction (1) y 3.2 sin 4.1t 2.3x (2) y 6.8 sin 3.0t 1.5x (3) y 4.9 sin 12.0t 18x A) 1, 2, and 3 B) 3 only C) 1 only D) 2 only E) 2 and 3 only

If the hub gear and the ring gear R have angular velocities (rads) and WR (rads), respectively, determine the angular velocity ws (rads) of the spur gear S 1 a. w (5w 3wH) 2 1 b. (5WR 3WH) (3WR 5WH) d. W, (5WR 3WH) 2 c. Ws a. wOA 2 1 For the figure shown angular velocity of its attached arm OA (5wR 3WH) (5WR 3wH1) (5WR 3WH) b. WOA

Weins Formula p. 6 1. The brightest color produced by an object at temperature of 6000 K is at a wavelength of 483 nm. What is the wavelength of the brightest color produced by a 3000 K object (do the math below) 1max X T122max x T2 2. The brightest color emitted by a certain star has a wavelength of 240 nm. Given that a 6000 K star produces its

PROBLEM The high E string on a certain guitar measures 64.0 cm in length and has a fundamental frequency of 329 Hz. When a guitarist presses down so that the string is in contact with the first fret (Fig. a), the string is shortened so that it plays an F note that has a frequency of 349 Hz. bridge nut 1st fret 2nd fret (b) (a) Playing an F note on

A surveyor is measuring distances in a level yard near a road. A fence post is due north from the surveyor and is 18.5 m away from him. A street sign is to the right of the fence post from the surveyor's view, and is a distance of 23.2 m from him. The surveyor measures the angle between the fence post and the street sign to be 22.2. a) What is the

FIGURE 2.12 Anatomy of an island arctrench system. Arc trench gap Volcanic island arc Forearc basin Accretionary prism Trench Oceananic lithosphere Asthenosphere,EXERCISE 2.9 Estimating the Steepness of Subduction Zones Name Course (a) Based on Island arctrench geometry (see Fig 2.12) and the fact that melting typically occurs at about the same

Figure 16.1 Source regions for air masses that influence North America. mP Maritime polar Cool, humid mT Maritime tropical Warm, humid cP Continental polar Cold, dry CT Continental tropical Hot, dry.. mP Maritime polar Cool, humid mT Maritime tropical Warm, humid,SmartFigure 16.2 Profiles of A. a warm front and B. a cold front. Warm front symbol

CALCULATIONS The experimental value for the acceleration of gravity obtained is g9.17ms (experimental value). We can show that this differs from the value g 9.8ms by 100 (9.809.17)9.80 6.4 the percentage of error. Use the experimental data in column L2 to calculate the experimental value of g and its percentage error deviation from 9.8ms. g ms

3. San Francisco vs. Lake Tahoe a) Find the annual range of temperatures for both San Franciscoand Lake Tahoe. You can find the range by taking the highestaverage temperature for the city, and subtracting the lowestaverage temperature. (Average temperatures are on the table). San Francisco Range: Lake Tahoe Range: b) Graph the temperature patterns

Part 2 Geographic Temperature Factors In this part, we are going to look at three main factors that influence temperature Latitude, Distance from water, and Altitude. We are going to look at how these three factors affect temperature by looking at the temperature difference between San Francisco, and three other locations Vancouver Canada, Wichita

Density of copper: 8000 kg/m3 Specific heat capacity of copper: 500 J/kg*K Thermal conductivity: 390 W/m*K

N erf(N) 000 0.00000 001 0.01128 002 0.02256 0.03 0.03384 0.04511 0.04 005 0.05637 0.06 0.06762 0.07 0.07886 0.08 0.09008 0.1013 0.09 0 10 0.1125 0.1236 0.1348 013 0.1459 0.14 0.1569 0.15 0.1680 0.16 0.1790 0.17 0.1900 0.2009 0.11 0.12 0.18 0.19 0.20 0 21 0 22 0 23 0 24 0.25 0.2118 0.2227 0.2335 0.2443 0.2550 0.2657 0.2763 N erf(N) 0.26 0.2869

A Spinning Space Station. You and your team are on a space station in deep space that is shaped like a ring and is spinning about its central axis. The crew resides on the inner surface of the outer edge and experiences artificial gravity with an acceleration of 9.80 ms. The station has a diameter of 750.0 m, and a mass of 3.70 107 kg. However,

PHYS 1720 NameInsert your name here h You can type these up on this Word Document or on a separate file (if you dont have Word and are looking at the .pdf file) and turn them in to the folder on D2L. Either option is find its up to you. Either way, make sure that you answer in your own words and not copied from another source (internet,

PHYZSPRINGBOARD POTENTIAL ENERGY A nail is partially driven into a block of wood. An iron ball is dropped onto the nail, driving the nail some depth into the wood. Without changing any characteristics of the wood or nail, how could a dropped iron ball drive the nail deeper into the wood 1. Factor 1 a. One way a dropped iron ball could drive the

Lightning is a spectacular example of electric current in a natural phenomenon. A typical event might transfer 2.0x10 9 Joules of energy across a potential difference of perhaps 4x10 7 V during a time interval of about 0.2 s. Use this information to estimate the total amount of charge transferred between cloud and ground?

The ground pushes against a 1,389 kg car's tires, doing 541,734 J of work. If it started from rest, how fast is the car moving after this work is done? (Your answer should be in m/s and given to the ones place).

What is the speed of an electron emitted from aluminium (stopping potential 4.08eV) when the electron is struck by light of frequency 7.01 x 105Hz? Give your answer in m/s.

The speed of a wave is 343m/s with frequency 20.2Hz, find the wavelength. Write your answer in meters, no need to write the unit.

A brick 30cm long 20cm and 5cm thick has a mass of 500g. Determine the i. Greatest pressure that can be exerted by the brick on the flat surface. ii. Least pressure exerted by the brick.

Although cheetahs are well known as the fastest sprinting animal on Earth, the lesser known pronghorn ( also known as the American antelope ) is the fastest long - distance running animal. Suppose you find a herd in the wild and measure how far they travel over a certain amount of time. Assuming they only travel in a straight line, if you measure

In the figure shown, the switch is closed with the capacitor uncharged. If C 47 F, 12 V, and R 3 k2, calculate the charge on the capacitor when the current is 4.0 mA. C R

Vector Addition. For the 2 vectors A 2.40 m at 40 and B 4.30 m at 160, find a) The components of each vector. Assume both vectors lie in the xy plane and all angles are measured from the zaxis. (2) b) The vector A B, in both component form and polar form. (4) c) The vector 2B A, in both component form and polar form. (4)

Dots and Crosses. For the two vectors A 3.00 2.00 4.00k and B 6.00 10.05 9.00k a. Find the dot product of the two vectors. (3) b. Find the cross product of the two vectors. (3) AXB AB c. Find cos Do both expressions yield the same angle (4) (Remember inverse trig ratios like cos 1 have TWO and sin1 solutions. Recall also that the angle between

The attenuation (intensity loss) of ultrasound in tissue is approximately 0.3 dB per MHz per cm of depth. (E.g., a 3 MHz signal traveling through 2 cm of tissue has its initial intensity reduced by 0.3x3x2 1.8 dB). Approximately how deep into the 1 of its tissue can a 10.5 MHz transducer probe before the intensity is reduced to 2T initial value,

A 50.0 g mass oscillating on a horizontal (massless) spring (k 20 Nm) across a frictionless surface has an initial velocity of magnitude 50.0 cms to the left as it passes its equilibrium length. a) Defining the xaxis as pointing to the right, write the xcomponent of the velocity of the mass at t 0 s. b) Draw a graph of v, versus time for this

A bat emits an ultrasonic pulse with a frequency of 4 6 kHz. It senses a moth flying by and 'measures' a time delay of 3 . 3 ms. How far away is the moth in units of meters? The speed of sound in air is 3 4 3 m/s.

The global production of platinum in 2 0 1 1 stands at about 1 7 8 metric tons per year, most from South Africa. The catalytic converter of a car requires about 1 gram of precious metal catalyst, most commonly, platinum. Car manufacture in 2 0 1 1 was approximately 5 2 million vehicles. If all have platinum catalysts, what fraction of the world

While many game balls are packaged in cylinders, some are packaged in rectangular boxes. Suppose that one type of ball has a radius of 2.4cm .The length and width of the boxs square base are both twice the radius, and the balls are packaged three to a box, so that the height is six times the radius. Would you guess that there would be more empty

The frequency of an elastic wave passing through a one dimensional monatomic lattice is given by co(q) a, sin (22), where a is the lattice spacing and q is the wave number and is a materialspecific constant. How does , depend on atomic mass Calculate the velocity of the wave when the wavelength becomes much greater than the lattice spacing.

A slinky contains 98 coils and may be modeled as a very long solenoid with a diameter 7.62 cm and when unstretched is 6.35 cm long. What is the self- inductance of an unstretched slinky?

Liquid helium is called a quantum liquid because the quantummechanical zeropoint mo tion of the helium atoms significantly affects the properties of the liquid. The strangest prop erty is superfluidity, which happens when liquid helium is cooled below approximately 2.15 K. Less strange, but also unique, is the large thermal expansion coefficient

A crate required 900 newtons (N) of force to lift. The crate was lifted by a forklift with an engine that provided 225 N of force. What is the mechanical advantage of the forklift?

A proton's rest mass is 1 . 6 7 1 0 - 2 7 kg. What is its total energy at a speed of 0 . 6 0 c ?

An elastic cord has an unstretched length of L. When a mass of 7 5 . 0 N hangs from it , the length stretches to 6 1 . 0 cm , and when a mass of weight 2 1 0 . N hangs from it , the length is 8 5 . 0 cm. Use this information to calculate the spring constant of this cord ( assuming it behaves like an ideal spring. )

A person hits a tennis ball with a mass of 0.058 kg against a wall. The average component of the ball's velocity perpendicular to the wall is 11 m/s, and the ball hits the wall every 2.1 s on average, rebounding with the opposite perpendicular velocity component. If the part of the wall the person hits has an area of 3.0m2, what is the average

A 50 kg athlete running at a speed v grabs a light rope that hangs from a 10 m high platform and swings to a maximum of 1.8 m above the ground. Later, a 100 kg athlete, running at the same speed, grabs a similar rope hanging from a 5 m high platform. What is the maximum height to which the 100 kg athlete swings?

V (mV) 250 200 150 50 0 0.38 mm 2 V i4 (Pxy) (Pxx) 3 4 5 Magnetic field (T) 6 V 7 3 10 8 0 V. (mv) Figure 1 Measured longitudinal and transverse voltages for a GaAs film at T 1.2K. The applied current is I 25.5.. Ref. M. E. Cage et al., IEEE Trans. Instrum. Meas. IM34, 301 (1985). (a) Use the lowfield data (0 B 0.5T) in Fig. 1 to calculate

There are variations of the Quantum Hall effect (QHE) such as the Quantum Spin Hall effect (QSHE) and Quantum Anomalous Hall effect (QAHE), where they show quantized conductances in the absence of applied external magnetic field. When dealing with quantized conductances, it is often useful to refer to the LandauerButtiker equation (TjiVi TijVj) I